Continuation of ndarray Notes on Machine Learning

Index and Slice of Array Index of multidimensional arrays 1 import numpy as np 2 arr=np.arange(1,25).reshape(2,3,4) 3 arr 4 # output array([[[ 1, 2, 3, 4], 5 [ 5, 6, 7, 8], 6 [ 9, 10, 11, 12]], 7 8 [[13, 14, 15, 16], 9 [17, 18, 19, 20], 10 [21, 22 ...

Posted by mmoussa on Tue, 20 Aug 2019 06:54:43 -0700

Knapsack Series Problems

I. 01 knapsack problem Concept: Every item can be taken only once Solution: See if the last item can go into the backpackMaximum type problem n items, known the weight of each item, backpack can bear the weight w, to find the maximum weight can be lo ...

Posted by weevil on Tue, 20 Aug 2019 02:12:11 -0700

FTL Basic Grammar

FTL Basic Grammar 1. Character output 2. Date Output 3. Digital Output (Take Digital 20 as an Example) 4. Declarative variables 5. COMPARISON OPERATOR 6. Arithmetic Operators 7. Logical Operators 8. Operator priorities in FreeMarker are as follows ...

Posted by jerr0 on Tue, 20 Aug 2019 01:08:37 -0700

Python Command Line Travel - Deep into argparse

Author: Hello GitHub-Prodesire Hello GitHub's "Explaining Open Source Projects" series, project address: https://github.com/HelloGitHu... Preface In the first article "A Preliminary Exploration of argparse", we have a preliminary grasp of the use of argparse's tetralogy, which has a basic sense of body.But what types of par ...

Posted by aaaaCHoooo on Tue, 20 Aug 2019 01:08:04 -0700

HDU 6681 Dendritic Array Euler Formula

To give a rectangular pin, a k-knife, each of which is a ray with non-coincident vertices and parallel axes in the cake, ask to cut the pin into several pieces. Euler's formula: V_E+F=2V-E+F=2V_E+F=2 points_edges+polygons=2 points-edges+polygons=2 po ...

Posted by deffe on Mon, 19 Aug 2019 20:04:20 -0700

Java implements maximum (small) heap and heap sorting, TopN problems

Java implements maximum (small) heap and heap sorting, TopN problems Articles Catalogue Java implements maximum (small) heap and heap sorting, TopN problems Java implementation heap Reactor Construction Insertion of heap Heap deletion Specific ...

Posted by perezf on Mon, 19 Aug 2019 05:00:41 -0700

Has the thread pool been used?

Has the thread pool been used? Thread pool advantage The main task of thread pool is to control the number of running threads, put tasks into the queue in the process of processing, and then start these tasks after thread creation. If the number ...

Posted by Niyati_1984 on Mon, 19 Aug 2019 01:28:30 -0700

TensorFlow Learning Records: Activation Functions

The main function of activation function is to add non-linear factors to solve the problem that linear models can not be multi-classified. It plays a very important role in the whole neural network. Because the mathematical basis of the neural networ ...

Posted by AdamSnow on Sun, 18 Aug 2019 22:24:22 -0700

vue development environment based on Web pack 4.x at novice level

Using webpack 4.x to build vue development environment in the initial stage Guide reading First of all, in this chapter, I will take you hand in hand to build a vue development environment using webpack 4.x. Students here may ask? "There ar ...

Posted by tbone-tw on Sun, 18 Aug 2019 21:28:01 -0700

Case 17. Archiving the Old Log

There is log rotate in Linux system. It can cut and archive old logs according to our expectation. It can also compress the cut logs and define the retention time of old logs. The requirement of this case is to use shell script to implement logrotate-like functions. Specific requirements are as follows: 1) The log path to be processed: / data/ ...

Posted by psychosquirrel on Sun, 18 Aug 2019 21:20:54 -0700